class_docstr: CacheChecker is a component that checks for the presence of documents in a Document Store based on a specified
  cache field.
docstr: Checks if any document associated with the specified field is already present in the store. If matching documents
  are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.
  
  :param items: A list of values associated with the cache_field to be checked against the cache.
  :return: A dictionary with two keys: "hits" and "misses". The values are lists of documents that were found in
  the cache and items that were not, respectively.
docstr_tok: ["Checks","if","any","document","associated","with","the","specified","field","is","already","present","in","the","store",".","If","matching","documents","are","found",",","they","are","returned","as","hits",".","If","not",",","the","items","are","returned","as","misses",",","indicating","they","are","not","in","the","cache",".",":","param","items",":","A","list","of","values","associated","with","the","cache_field","to","be","checked","against","the","cache",".",":","return",":","A","dictionary","with","two","keys",":","``","hits","''","and","``","misses","''",".","The","values","are","lists","of","documents","that","were","found","in","the","cache","and","items","that","were","not",",","respectively","."]
code: def run(self, items: List[Any]):
      """
      Checks if any document associated with the specified field is already present in the store. If matching documents
      are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.
  
      :param items: A list of values associated with the cache_field to be checked against the cache.
      :return: A dictionary with two keys: "hits" and "misses". The values are lists of documents that were found in
      the cache and items that were not, respectively.
      """
      found_documents = []
      misses = []
  
      for item in items:
          filters = {self.cache_field: item}
          found = self.document_store.filter_documents(filters=filters)
          if found:
              found_documents.extend(found)
          else:
              misses.append(item)
      return {"hits": found_documents, "misses": misses}
  
file_path: haystack/haystack/components/caching/cache_checker.py
imports: from typing import List, Dict, Any
  import importlib
  import logging
  from haystack import component, Document, default_from_dict, default_to_dict, DeserializationError
  from haystack.document_stores.types import DocumentStore
label_desc: Use image node_id 4 for calling the CacheChecker obj's underlying member method code with example usage: obj.run(items) and returns: dict